The unusual anal fistula.
D000038:Abscess / Q000209:etiology; D003093:Colitis, Ulcerative / Q000150:complications; D003424:Crohn Disease / Q000150:complications; D003884:Dermoid Cyst / Q000175:diagnosis; D003937:Diagnosis, Differential; D004733:Enema / Q000009:adverse effects; D004841:Episiotomy / Q000009:adverse effects; D005260:Female; D005401:Fissure in Ano / Q000150:complications / Q000175:diagnosis / Q000209:etiology / Q000601:surgery; D006801:Humans; D008297:Male; D011468:Prostatectomy / Q000009:adverse effects; D014624:Vaginal Fistula / Q000209:etiology